| 0x10 |
generalReject |
ECU rejected request |
Generic error |
Retry or check service support |
| 0x11 |
serviceNotSupported |
Service unsupported |
ECU does not implement |
Use supported service |
| 0x12 |
subFunctionNotSupported |
Subfunction unsupported |
Invalid subfunction |
Use valid subfunction |
| 0x13 |
incorrectMessageLengthOrInvalidFormat |
Bad length/format |
Wrong payload length |
Fix request format |
| 0x14 |
responseTooLong |
Response too long |
Buffer limits |
Use smaller request |
| 0x21 |
busyRepeatRequest |
ECU busy |
ECU overloaded |
Wait and retry |
| 0x22 |
conditionsNotCorrect |
Preconditions not met |
Wrong session/state |
Switch session or meet conditions |
| 0x23 |
requestSequenceError |
Invalid sequence |
Wrong order |
Follow correct flow |
| 0x24 |
noResponseFromSubnetComponent |
Subnet not responding |
Gateway issue |
Check subnet device |
| 0x25 |
failurePreventsExecutionOfRequestedAction |
Internal failure |
ECU error |
Retry after reset |
| 0x26 |
requestCorrectlyReceivedResponsePending |
Response pending |
Long operation |
Wait for final response |
| 0x31 |
requestOutOfRange |
Parameter out of range |
Invalid DID/address |
Fix parameters |
| 0x32 |
securityAccessDenied |
Security denied |
Locked ECU |
Perform SecurityAccess |
| 0x33 |
securityAccessDenied |
Security denied |
Locked ECU |
Perform SecurityAccess |
| 0x34 |
authenticationRequired |
Authentication required |
Missing auth |
Run authentication |
| 0x35 |
invalidKey |
Wrong security key |
Bad key algorithm |
Recompute key |
| 0x36 |
exceedNumberOfAttempts |
Too many attempts |
Brute force |
Wait and retry later |
| 0x37 |
requiredTimeDelayNotExpired |
Delay not expired |
Lockout active |
Wait and retry |
| 0x38 |
secureDataTransmissionRequired |
Secure data needed |
Missing secure channel |
Enable secure data transmission |
| 0x39 |
secureDataTransmissionNotAllowed |
Secure data not allowed |
Policy restriction |
Check ECU policy |
| 0x3A |
secureDataVerificationFailed |
Verification failed |
Bad signature |
Verify payload |
| 0x50 |
certificateVerificationFailedInvalidTimePeriod |
Cert invalid time |
Expired cert |
Update cert |
| 0x51 |
certificateVerificationFailedInvalidSignature |
Cert signature invalid |
Bad cert |
Replace cert |
| 0x52 |
certificateVerificationFailedInvalidChainOfTrust |
Bad chain |
Untrusted CA |
Install correct chain |
| 0x53 |
certificateVerificationFailedInvalidType |
Cert type invalid |
Wrong cert type |
Use correct cert |
| 0x54 |
certificateVerificationFailedInvalidFormat |
Cert format invalid |
Corrupt cert |
Reissue cert |
| 0x55 |
certificateVerificationFailedInvalidContent |
Cert content invalid |
Bad fields |
Reissue cert |
| 0x56 |
certificateVerificationFailedInvalidScope |
Cert scope invalid |
Out of scope |
Use proper scope |
| 0x57 |
certificateVerificationFailedInvalidCertificateName |
Cert name invalid |
CN mismatch |
Use correct cert |
| 0x58 |
certificateVerificationFailedInvalidCertificateSecurity |
Cert security invalid |
Weak security |
Use stronger cert |
| 0x59 |
certificateVerificationFailedInvalidCertificateData |
Cert data invalid |
Corrupt data |
Reissue cert |
| 0x5A |
certificateVerificationFailedInvalidCertificateLength |
Cert length invalid |
Corrupt length |
Reissue cert |
| 0x5B |
certificateVerificationFailedInvalidCertificateID |
Cert ID invalid |
Unknown cert ID |
Use correct cert ID |
| 0x5C |
certificateVerificationFailedInvalidCertificateRole |
Cert role invalid |
Wrong role |
Use correct role |
| 0x5D |
certificateVerificationFailedInvalidCertificateSupplier |
Cert supplier invalid |
Untrusted supplier |
Use trusted supplier |
| 0x70 |
uploadDownloadNotAccepted |
Upload/download rejected |
Wrong session |
Switch to programming |
| 0x71 |
transferDataSuspended |
Transfer suspended |
Flow interrupted |
Resume transfer |
| 0x72 |
generalProgrammingFailure |
Programming failed |
Flash error |
Retry or check memory |
| 0x73 |
wrongBlockSequenceCounter |
Block counter wrong |
Sequence error |
Fix counter and retry |
| 0x78 |
requestCorrectlyReceivedResponsePending |
Response pending |
Long operation |
Wait for final response |
| 0x7E |
subFunctionNotSupportedInActiveSession |
Not supported in session |
Wrong session |
Switch session |
| 0x7F |
serviceNotSupportedInActiveSession |
Service blocked in session |
Wrong session |
Switch session |
| 0x81 |
rpmTooHigh |
RPM too high |
Engine state |
Adjust RPM |
| 0x82 |
rpmTooLow |
RPM too low |
Engine state |
Adjust RPM |
| 0x83 |
engineIsRunning |
Engine running |
Safety rule |
Stop engine |
| 0x84 |
engineIsNotRunning |
Engine not running |
Safety rule |
Start engine |
| 0x85 |
engineRunTimeTooLow |
Engine runtime low |
Preconditions |
Run engine longer |
| 0x86 |
temperatureTooHigh |
Temperature too high |
Safety rule |
Cool down |
| 0x87 |
temperatureTooLow |
Temperature too low |
Safety rule |
Warm up |
| 0x88 |
vehicleSpeedTooHigh |
Speed too high |
Safety rule |
Slow down |
| 0x89 |
vehicleSpeedTooLow |
Speed too low |
Safety rule |
Increase speed |
| 0x8A |
throttlePedalTooHigh |
Throttle too high |
Safety rule |
Release throttle |
| 0x8B |
throttlePedalTooLow |
Throttle too low |
Safety rule |
Press throttle |
| 0x8C |
transmissionRangeNotInNeutral |
Not in neutral |
Safety rule |
Shift to neutral |
| 0x8D |
transmissionRangeNotInGear |
Not in gear |
Safety rule |
Shift to gear |
| 0x8E |
brakeSwitchNotClosed |
Brake not pressed |
Safety rule |
Press brake |
| 0x8F |
shifterLeverNotInPark |
Not in park |
Safety rule |
Shift to park |
| 0x90 |
torqueConverterClutchLocked |
TCC locked |
Safety rule |
Unlock TCC |
| 0x91 |
voltageTooHigh |
Voltage high |
Electrical state |
Stabilize voltage |
| 0x92 |
voltageTooLow |
Voltage low |
Electrical state |
Stabilize voltage |
| 0x93 |
ecuInCalibrationMode |
ECU in calibration mode |
State restriction |
Exit calibration mode |
| 0x94 |
vehicleIsMoving |
Vehicle moving |
Safety rule |
Stop vehicle |